SCJP題庫第073題

10. interface Data { public void load(); }

11. abstract class Info { public abstract void load(); }

Which class correctly uses the Data interface and Info class?

A. public class Employee extends Info implements Data {

public void load(){ /* do something */ }

}

B. public class Employee implements Info extends Data {

public void load(){ /* do something */ }

}

C. public class Employee extends Info implements Data

public void load(){ /* do something */ }

public void Info.load(){ /* do something */ }

}

D. public class Employee implements Info extends Data {

public void Data.load(){ /* do something */ }

public void load(){ /* do something */ }

}

E. public class Employee implements Info extends Data {

public void load(){ /* do something */ }

public void Info.load(){ /* do something */ }

}

F. public class Employee extends Info implements Data{

public void Data.load(){ /* do something */ }

public void Info.load(){ /* do something */ }

}

 

 

Ans: A

 

解說:

實作介面或繼承抽象方法 都要實現其中的抽象方法